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Monteregianite-(Y)

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CFL837660

Monteregianite-(Y)

Type Locality

Description Tabs

Description
Locality: 
Poudrette Quarry, Mont Saint-Hilaire, Québec, Canada
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
6 × 3.7 × 2 cm
Description

Rich type locality specimen of mostly individual monteregianite-(Y) crystals scattered on albite, associated possibly with type locality donnayite-(Y).  The Poudrette Quarry is the only locality where monteregianite-(Y) is found.  Collected by Gilles Haineault.

Mineral Data
What's on the rock

Monteregianite-(Y)

Formula: 
(Na,K)6(Y,Ca)2Si16O38·10H2O
Strunz: 
9.EB.15
Hardness: 
3.5
Type Locality: 
Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry; Carrière Mont Saint-Hilaire), Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada

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